Super Mario 64's best world is actually Peach's Castle

Princess Peach’s Castle, an innovative spin on the idea of a “hub world,” showed Super Mario 64 players that there were secrets to be found right from the start. 

Super Mario 64 - Wikipedia

How To Get On Top of The Castle in Super Mario 64

The Mario 64 PC port looks like a full-blown remaster with new 4K texture pack

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Nintendo won't let you read this Super Mario 64 guidebook from 1996

Why Super Mario 64's legendary sign still can't be read on Switch - Polygon

I tried to reimagine Peach's Castle from Super Mario 64 : r/dalle2

Peach's Castle by mattmillsart on DeviantArt

Princess Peach's Mario Super Mario 64 castle would be worth almost $1 billion - Polygon

Peach's Castle, The SMG4/GLITCH Wiki